Liquid-fuel burner



gully l R924.

E. l. STAPLES LIQUID FUEL BURNER C'lilatented July l, i924,

EARLE STAPLES, OF NEW YORK, N. Y.

/ n i LIQUD-FU'EL BURNER.

Application led March 31, 1923. Serial No. 629,075.

To all whom t may @Oncewt Be it known that l, EARLE l. STAPLES, a citizen ofthe United States, residing at New York city, in the county of New York and State of New York, have invented new and useful improvements in Liquid-Fuel Burners (Case B), of which the following is a specification.

This invention relates to liquid fuel burners and particularly to means or atomizing the mixture employed in burners of this type, and has for its primary object the provision of means for super-heating, pulverizing and vaporizing steam and oil into an oil gas of the highest eficiency While l refer to the use of oil and steam in connection with the burner, this is simply illustrated, and it shall be understood that air as an atomizing agent. can be used in all types of boilers, furnaces, retorts, kilns, heaters, etc. y f

A further object of the invention is to provide a burner having means for rendering the burner self cleaning, thus eliminating` the necessity of removing the burner from I its connection.

A still further object of the invention is to provide a burner having an oil mixer and a mixer for steam or air, the latter being designed to impel a mist of steam or air in an atomized state to a mixing chamber and the former being correspondingly designed to deliver a mist of oil to said chamber in the direct path or course of travel of air or steam passing from said steam or air mixer, and the two said mixers co-acting to thoroughly' super-heat, atomize and vaporize the mixture and cause it to be finally discharged-in relatively equalized volumes from the tip of the burner.

With these and other objects in view, the invention resides in certain novel construction and combination and arrangement of parts, the essential features of which are hereinafter fully described, are particularly pointed out in the appended claim, and are illustrated in the accompanying drawing, in which Figure 1 is a longitudinal section through the burner showing parts in elevation Figure 2 is a side elevation of the companion mixers.

Figure 3 is a view looking toward one end .of the mixer structure.

Figure et is a similar view of the opposite end of the mixer structure.

Figure 5 is a vertical longitudinal section through the bushing.

Figure 6 is an end view of the bushing.

Figure 7 isa section taken approximately on line 7 7 of Figure 1, the valve being omitted,

kFigure 8 is a section through a modified form of tip.

Figure 9 are detail views of the washer.

Figure 10 is a transverse sect-ion through the valve.

ln carrying the invention into practice, l employ a valve casing or body 10 divided by diaphragms or parting walls 11 to provide non-communicating spaces l2 and 13, the latter being connected with a union 14 adapted to be connected in any suitable customary manner with an oil feed pipe. lThe space 11 is connected with a similar union 15 adapted to be connected with a pipe for the admission to the burner of steam or compressed air.

The body 10 is provided with a hollow cylindrical valve seat 16 with which a substantially cylindrical valve 17 co-acts. This valve is provided with a V-shaped port 18 at one side, the walls of which are beveled to produce knife edges 19, The valve 17 is provided with a stem 2O which passes through a stuifing box 21 on one end of a bonnet 22. This bonnet is interiorly threaded to accommodate the thread 23 of the valve stem. Is this manner the valve 17 can be moved in the bore 24 of the seat 16 or adjusted with respect thereto so that requisite portions of the port 18 can be respectively covered and uncoveredt The valve 17 operates in a portion of the space 13 so that the oil entering said space is free to pass over the knife edges 19 and through the port 18 where it will be delivered to mixing end of the burner in a manner to be hereinafter explained` The valve ste-m 20 is provided at one end with a suitable hand wheel 25, and at the juncture of the stem with the valve 17, aicircular collar 17a is formed and adapted to fully close against a circular wall 17b of the seat 16.-

Connected with the body 10 inv communication with the space 12 is a steam or air pipe 26, the same adapted to act as a conduit for the passage of air or steam from the union 15 to the tip of the burner. By causing the steam to flow around the oil pipe 29, the oil is superheated before passing to they mixing chamber of the burner,

The oppositeend of the pipe 26 has connection with a sleeve 27 which in turn7 is threadedly connected with a bushing 28.

Connected at one of its ends to the scat 16 is an oil pipe 297 the opposite end of which is threadedly connected in the bore 30 of a mixer structure 31. This structure 31 comprises a mixer or head 32 of cylindrical formation of a proportion to snugly fit within va part of the sleeve 27 and a mixer 32a which extends through an aperA ture 34 in the forward end of the aforesaid bushing 28. The mixer 32 is provided with peripheral spiral slots 35 which open respectively toward the opposite ends of the sleeve'27.` `The mixer 32 is also formed with spirally milled horizontal slots 36. These mixers 321'and 32a are positioned with re spect to each other and in the sleeve 27 and bushing 28 whereby they define with the Walls thereof a mixingor atomizing chamber 36. Said mixers 32 and 32a are joined together by a portion 37 having radial apertures 38 of relatively small proportion. The end 0f; the mixer structure 31 beyond the mixer 32 is closed by a suitable member 33.

The tip 39 is in the form 0f a hollow body.` removably connected at 40 tothe forward end of the bushing 28. ThisA tip has perforated cast washers 42 arranged therein so as to deflect oil and, steam vapor gas equally to the `top and bottom slots 43 and 44 in the front of the tip. These slots 43 and 44 are milled so as to be disposed in a plane parallel to the longitudinal axis of said; tip. As stated, the mixer 32 passes through the aperture 34 in the forward end of the bushing 28 and as clearly shown in Figure. 6, it will be observed that said mixer is..disposed slightly below the longitudinal center of the tip 39, whereby'to allow the oil and steam gas tok emerge with proper flow through the apertures inhthe washers 42, causing the flow to be equalize'd in equal volume to each of the aforesaid slots 43 and 44. Around the mixer 32c1 and formed in the front wall of the bushing 28 is a circular series of small apertures 45 which open at one side to the burner tip and at the opposite side to the atomizing or mixing chamber defined by the spacing o-f the mixers 32 and 32a and their `relation to the internal walls of sleeve 27 and bushing 28.

VIn operation,` steam or compressed air enters the top union 15 and flows by way of the space 12 into the pipe 16, then through mixer 32 whose slots or grooves 35 act to place the steam in centrifugal motion and correspondingly move the steam while' inthis motion and in a pulverized state through the mixing and atomizing chamber in front of said mixer 32. This wire draws the steam and sets actual amount of atomizing` steamv'from boiler.y Oil passes through the port 18 in the valve 17 and enteis the pipe 2,7 where it is permitted to flow to the connection 37. From this connection the oil in a finely atomized state or in mist form is scattered in radial directions in the mixing chamber and in the direct path or course of the atomized steam as it whirls through said chamber on its passage from the mixer 32. Incident to this manner of combining the. oil with steam in centrifugal motion, the atoms of oil are thoroughly dieintegrated and combined in a highly atomized state with the steam or air as the case may be. The mixture then proceeds throiughl the apertures 45 and the spiral slots 36 of the mixer 32 so that the oil gas is further pulverized before `its actual pas` sage to the burner tip.

Each of the unions 14 and 15 is provided with a suitable strainer A and its function is to prevent sediment or foreign mattei'.

from passing into the burner.

In order that the burner can be blown out and cleaned, and inl fact rendered self cleaning, I connect the steam or air spaceV 12 with a valve B at one side of the body This valve co-acts with a by-pass Q 10. between the space 13 and the chamber D of said valve B. An aperture E is formed in one wall of the chamber D to cofact;

In vthe modified form of my invention illustrated in Figures 8 and 9, the tip. 39?*A is provided with a single slot 43a and aco-acting apertured washer 42a.

While I have described what I deem. to be the most desirable embodiment of my invention, it is obvious that many ofthe details may be varied without in `any way departing from the spirit of my invention, and I therefore do not Vlimit myself to the exact details of construction herein set forth` nor tol anything less than. the whole of my invention limited only by the ap-Y pended claim.

What is claimed as new is 1+.-

A liquid fuel burner, a cylindrical chamber having an inlet opening-V atrone end adaptedto be arranged in communication with a source of steam or air, a tip arranged upon the outer end of thecylindrical chamber and having a plurality of' slots therein,V

a pair of divergent plates arranged in the tip and disposed in the path of a combus--,

iio

tible mixture passing through the tubular chamber, the plates having openings therein, a tube. arranged in the cylindrical lcasing and having one end closed and its other end in communication with a source. of liquid fuel, and provided with a plurality of outlet openings adjacent its closed end, a circular head carried by the tube intermediate its ends and being of a diameter equal to the diameter of the cylindrical chamber, and provided With a plurality of parallel radial ports in its periphery through which the steam or air passes, an annular element arranged in the cylindrical casing adjacent' the tip, and a second head carried by the tube adjacent its closed end and being of a diameter to be received in the bushing and also having radial slots through Wlliich the combustible mixture passes to thoroughly mix the latter before it passes into the tipE In testimony whereof l have aiiixed m-v signature, o

EARLE l. STAPLES 

